GREENSBORO, N.C. — Russell Henley shot a 6-under 64 on Friday to open a four-stroke lead halfway through the Wyndham Championship.

Henley was at 14-under 126, tying Stewart Cink at the RBC Heritage in April for the lowest 36-hole score this season in a tournament Cink went on to win.

Olympic silver medalist Rory Sabbatini was tied for second with past champion Webb Simpson and playoff bubble man Scott Piercy.

Sabbatini shot a 64, Simpson 65 and Piercy at 66.

Former FedEx Cup champion Justin Rose, outside the playoffs at the start of the week, continued his surge toward the postseason with a 65 that left him at 9 under in a group with Tyler Duncan and Brian Stuard.

Duncan had the lowest score of the round at 62. Stuard shot 66.

When Henley teed off, the first-round leader had already been passed by Sabbatini, Piercy and Simpson. Henley, who opened on the back nine, got going with four straight birdies on Nos. Nos. 14-17 to regain the lead.

Henley added three more birdies on his final nine. It was a couple of months ago that Henley shared the halfway lead at the U.S. Open.